Refresh NAS performance with the 8GB D4ES01-8G ECC DDR4 SO-DIMM Memory Module from Synology. Unbuffered and utilizing error-correcting code (ECC), this 260-pin SO-DIMM provides 8GB of DDR4 RAM. The D4ES01-8G module is compatible with Synology 21-Series NAS arrays, including the DS1821+, DS1621xs+, and DS1621+.
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Purchased it for 1825+ threw the package the learned it’s not the ram for on compatibility on Synology website. My error, my fault. It still worked, luckily. Now that I am learning more about nas I wish I went with 2x16 tb instead. Ram cache seems to really speed things up. I’ve shut the nas a few times to cable manage. Upon initial boon and ram cache not utilized the slowdown is noticeable compared to when frequently access files are cached on ram.
How does one rate a memory card? It either works or it doesn't. The one I purchased is working quite well. It installed very easily. It passed the Synology memory test. It's being used by the applications running on my NAS. Now, this may all change in five years, but at the moment all is well.